{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,27]],"date-time":"2025-11-27T10:51:59Z","timestamp":1764240719504,"version":"build-2065373602"},"reference-count":62,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2023,12,29]],"date-time":"2023-12-29T00:00:00Z","timestamp":1703808000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","award":["CIP\u2014Ref\u00aa UID\/PSI\/04345\/2020","UIDB\/00006\/2020"],"award-info":[{"award-number":["CIP\u2014Ref\u00aa UID\/PSI\/04345\/2020","UIDB\/00006\/2020"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sustainability"],"abstract":"<jats:p>Using self-determination theory, this study examined the autonomous motivation and regulatory styles of volunteers. The Volunteer Motivation Scale (VMS) is one of the main instruments available to assess these constructs, but it requires validation and adaptation for different contexts. Therefore, the goal of this study was to analyze the psychometric properties of the 12-item VMS in a sample of Portuguese volunteers. The sample consisted of 207 volunteers, mostly women (74.4%), aged from 14 to 81 years, from various areas of volunteering. The measures included self-regulation, basic psychological needs, causality orientation, and autonomy support. Confirmatory factor analysis using the lavaan package in R was performed to test a four-factor model and a two-factor model. The results indicated that the four-factor model had a better fit to the data. The VMS showed good internal consistency, discriminant validity, and convergent validity. The VMS can be viewed as a valuable tool for professionals and a promising avenue for future research on the motivations of volunteers.<\/jats:p>","DOI":"10.3390\/su16010327","type":"journal-article","created":{"date-parts":[[2023,12,29]],"date-time":"2023-12-29T09:15:11Z","timestamp":1703841311000},"page":"327","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["The Volunteer Motivation Scale (VMS): Adaptation and Psychometric Properties among a Portuguese Sample of Volunteers"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1819-8516","authenticated-orcid":false,"given":"C\u00e1tia","family":"Martins","sequence":"first","affiliation":[{"name":"Psychology Research Centre (CIP), 1169-023 Lisboa, Portugal"},{"name":"Faculty of Human and Social Sciences, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal"}]},{"given":"Saul","family":"Jesus","sequence":"additional","affiliation":[{"name":"Faculty of Human and Social Sciences, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal"},{"name":"Research Centre for Tourism, Sustainability and Well-Being (CinTurs), University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal"}]},{"given":"Jos\u00e9 Tom\u00e1s","family":"da Silva","sequence":"additional","affiliation":[{"name":"Centre for Social Studies, Faculty of Psychology and Educational Sciences, University of Coimbra, 3000-995 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0185-3200","authenticated-orcid":false,"given":"Concei\u00e7\u00e3o","family":"Ribeiro","sequence":"additional","affiliation":[{"name":"Centre of Statistics and its Applications (CEAUL), Faculty of Sciences, University of Lisboa, 1749-016 Lisboa, Portugal"},{"name":"Institute of Engineering, University of Algarve, Campus da Penha, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7151-8363","authenticated-orcid":false,"given":"Maria Dulce","family":"Est\u00eav\u00e3o","sequence":"additional","affiliation":[{"name":"School of Health, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal"}]},{"given":"Helena","family":"Mocho","sequence":"additional","affiliation":[{"name":"Psychology Research Centre (CIP), 1169-023 Lisboa, Portugal"},{"name":"Faculty of Human and Social Sciences, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1778-8343","authenticated-orcid":false,"given":"Elias","family":"Ratinho","sequence":"additional","affiliation":[{"name":"Psychology Research Centre (CIP), 1169-023 Lisboa, Portugal"},{"name":"Faculty of Human and Social Sciences, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1009-0519","authenticated-orcid":false,"given":"Cristina","family":"Nunes","sequence":"additional","affiliation":[{"name":"Psychology Research Centre (CIP), 1169-023 Lisboa, Portugal"},{"name":"Faculty of Human and Social Sciences, University of Algarve, Campus of Gambelas, 8005-139 Faro, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2023,12,29]]},"reference":[{"key":"ref_1","first-page":"61","article-title":"Volunteer motivation and satisfaction","volume":"1","author":"Bang","year":"2009","journal-title":"J. Venue Event Manag."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Bauer, S., and Lim, D. (2019). Effect of Communication Practices on Volunteer Organization and Retention. Sustainability, 11.","DOI":"10.3390\/su11092467"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Cho, M., Bonn, M.A., and Han, S.J. (2018). Generation Z\u2019s Sustainable Volunteering: Motivations, Attitudes and Job Performance. Sustainability, 10.","DOI":"10.3390\/su10051400"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Saz-Gil, M.I., Cosenza, J.P., Zardoya-Alegria, A., and Gil-Lacruz, A.I. (2020). Exploring Corporate Social Responsibility under the Background of Sustainable Development Goals: A Proposal to Corporate Volunteering. Sustainability, 12.","DOI":"10.3390\/su12124811"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"671","DOI":"10.1037\/0022-3514.68.4.671","article-title":"Sustained helping without obligation: Motivation, longevity of service, and perceived attitude change among AIDS volunteers","volume":"68","author":"Omoto","year":"1995","journal-title":"J. Personal. Soc. Psychol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"447","DOI":"10.1111\/1540-4560.00270","article-title":"Dispositional and organizational influences on sustained volunteerism: An interactionist perspective","volume":"58","author":"Penner","year":"2002","journal-title":"J. Soc. Issues"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"156","DOI":"10.1111\/1467-8721.00037","article-title":"The motivations to volunteer: Theoretical and practical considerations","volume":"8","author":"Clary","year":"1999","journal-title":"Curr. Dir. Psychol. Sci."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"1516","DOI":"10.1037\/0022-3514.74.6.1516","article-title":"Understanding and assessing the motivations of volunteers: A functional approach","volume":"74","author":"Clary","year":"1998","journal-title":"J. Personal. Soc. Psychol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"653","DOI":"10.1016\/j.paid.2009.01.010","article-title":"Intrinsic vs. extrinsic motivational orientations and the volunteer process","volume":"46","author":"Finkelstien","year":"2009","journal-title":"Personal. Individ. Differ."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1007\/s11031-007-9079-4","article-title":"Designing volunteers\u2019 tasks to maximize motivation, satisfaction and performance: The impact of job characteristics on volunteer engagement","volume":"32","author":"Millette","year":"2008","journal-title":"Motiv. Emot."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"525","DOI":"10.1037\/0022-3514.74.2.525","article-title":"Dispositional and structural determinants of volunteerism","volume":"74","author":"Penner","year":"1998","journal-title":"J. Personal. Soc. Psychol."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"846","DOI":"10.1177\/0002764202045005007","article-title":"Considerations of community: The context and process of volunteerism","volume":"45","author":"Omoto","year":"2002","journal-title":"Am. Behav. Sci."},{"key":"ref_13","unstructured":"Snyder, M., and Omoto, A. (2009). Youth Empowerment and Volunteerism: Principles, Policies and Practices, City University of HK Press."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Dovidio, J.F., Piliavin, J.A., Schroeder, D.A., and Penner, L.A. (2017). The Social Psychology of Prosocial Behavior, Lawrence Erlbaum.","DOI":"10.4324\/9781315085241"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"112","DOI":"10.1177\/0899764014561122","article-title":"Motivations to volunteer and their associations with volunteers\u2019 well-being","volume":"45","author":"Stukas","year":"2014","journal-title":"Nonprofit Volunt. Sect. Q."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"310","DOI":"10.1080\/00224545.2015.1135864","article-title":"The quality of volunteers\u2019 motives: Integrating the functional approach and self-determination theory","volume":"156","author":"Strubel","year":"2016","journal-title":"J. Soc. Psychol."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"32","DOI":"10.1007\/s11266-012-9269-x","article-title":"Autonomous motivation stimulates volunteers\u2019 work effort: A self-determination theory approach to volunteerism","volume":"24","author":"Bidee","year":"2013","journal-title":"Volunt. Int. J. Volunt. Nonprofit Organ."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"807","DOI":"10.1007\/s11266-021-00444-5","article-title":"Toward a Refined Insight Into the Importance of Volunteers\u2019 Motivations for Need-Based Experiences, Job Satisfaction, Work Effort, and Turnover Intentions in Nonprofit Sports Clubs: A Person-Centered Approach","volume":"33","author":"Willem","year":"2022","journal-title":"Volunt. Int. J. Volunt. Nonprofit Organ."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1195","DOI":"10.1177\/0899764011433041","article-title":"Self-determination theory as a framework for exploring the impact of the organizational context on volunteer motivation: A study of Romanian volunteers","volume":"41","author":"Haivas","year":"2012","journal-title":"Nonprofit Volunt. Sect. Q."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1111\/ajsp.12127","article-title":"Validation of the Volunteer Motivation Scale and its relations with work climate and intention among Chinese volunteers","volume":"19","author":"Li","year":"2016","journal-title":"Asian J. Soc. Psychol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"618","DOI":"10.1007\/s11266-015-9593-z","article-title":"Volunteer motivation and organizational climate: Factors that promote satisfaction and sustained volunteerism in NPOs","volume":"27","author":"Nencini","year":"2016","journal-title":"Volunt. Int. J. Volunt. Nonprofit Organ."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"869","DOI":"10.1177\/0899764013485158","article-title":"Leadership and volunteer motivation: A study using self-determination theory","volume":"43","author":"Oostlander","year":"2014","journal-title":"Nonprofit Volunt. Sect. Q."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Deci, E., and Ryan, R. (1985). Intrinsic Motivation and Self-Determination in Human Behavior, Springer.","DOI":"10.1007\/978-1-4899-2271-7"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"227","DOI":"10.1207\/S15327965PLI1104_01","article-title":"The \u201dwhat\u201d and \u201cwhy\u201d of goal pursuits: Human needs and the self-determination of behavior","volume":"11","author":"Deci","year":"2000","journal-title":"Psychol. Inq."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"54","DOI":"10.1006\/ceps.1999.1020","article-title":"Intrinsic and extrinsic motivations: Classic definitions and new directions","volume":"25","author":"Ryan","year":"2000","journal-title":"Contemp. Educ. Psychol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"182","DOI":"10.1037\/a0012801","article-title":"Self-determination theory: A macrotheory of human motivation, development, and health","volume":"49","author":"Deci","year":"2008","journal-title":"Can. Psychol. Psychol. Can."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"1570","DOI":"10.1177\/0146167203256877","article-title":"On the investigation of primed and chronic autonomous and heteronomous motivational orientations","volume":"29","author":"Levesque","year":"2003","journal-title":"Personal. Soc. Psychol. Bull."},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Ryan, R.M., and Deci, E.L. (2017). Self-Determination Theory: Basic Psychological Needs in Motivation, Development, and Wellness, Guilford Publications.","DOI":"10.1521\/978.14625\/28806"},{"key":"ref_29","unstructured":"Runco, M.A., and Albert, R.S. (1990). Theories of Creativity, Sage Publications, Inc."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"222","DOI":"10.1037\/a0016984","article-title":"When helping helps: Autonomous motivation for prosocial behavior and its influence on well-being for the helper and recipient","volume":"98","author":"Weinstein","year":"2010","journal-title":"J. Personal. Soc. Psychol."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Rondeau, S., Stricker, S.M., Kozachenko, C., and Parizeau, K. (2020). Understanding Motivations for Volunteering in Food Insecurity and Food Upcycling Projects. Soc. Sci., 9.","DOI":"10.3390\/socsci9030027"},{"key":"ref_32","doi-asserted-by":"crossref","unstructured":"Alhajjaj, H.A., and Al Nabulsi, H.H. (2022). Volunteer Working during COVID-19 in Jordanian Community: Advantages and Challenges. Soc. Sci., 11.","DOI":"10.3390\/socsci11080377"},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Almeida, F., Morais, J., and Pereira, A. (2022). Portuguese Volunteer Firefighters in the Context of the Challenges Posed by the COVID-19 Pandemic. Soc. Sci., 11.","DOI":"10.3390\/socsci11070285"},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"749","DOI":"10.1037\/0022-3514.57.5.749","article-title":"Perceived locus of causality and internalization: Examining reasons for acting in two domains","volume":"57","author":"Ryan","year":"1989","journal-title":"J. Personal. Soc. Psychol."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"2045","DOI":"10.1111\/j.1559-1816.2004.tb02690.x","article-title":"Intrinsic need satisfaction: A motivational basis of performance and well-being in two work settings","volume":"34","author":"Baard","year":"2004","journal-title":"J. Appl. Soc. Psychol."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"331","DOI":"10.1002\/job.322","article-title":"Self-determination theory and work motivation","volume":"26","author":"Deci","year":"2005","journal-title":"J. Organ. Behav."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"199","DOI":"10.1023\/A:1025007614869","article-title":"The role of autonomy support and autonomy orientation in prosocial behavior engagement","volume":"27","year":"2003","journal-title":"Motiv. Emot."},{"key":"ref_38","unstructured":"Esmond, J., and Dunlop, P. (2004). Developing the volunteer motivation inventory to assess the underlying motivational drives of volunteers in Western Australia. A Research Project funded by Lotterywest, 1\u201381."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"87","DOI":"10.3280\/PSC2013-001008","article-title":"La Volunteer Motivation Scale per la misura della motivazione autonoma al volontariato: Analisi preliminar. [The Volunteer Motivation Scale for measuring autonomous motivation to volunteer: Preliminary analysis]","volume":"1","author":"Meneghini","year":"2013","journal-title":"Psicol. Comun."},{"key":"ref_40","first-page":"36","article-title":"Sport event volunteers\u2019 engagement: Management matters","volume":"19","author":"Allen","year":"2014","journal-title":"Manag. Leis."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"1325","DOI":"10.1080\/10447318.2020.1746061","article-title":"\u201cI Am Most Grateful.\u201d Using Gratitude to Improve the Sense of Relatedness and Motivation for Online Volunteerism","volume":"36","author":"Naqshbandi","year":"2020","journal-title":"Int. J. Hum. Comput. Interact."},{"key":"ref_42","doi-asserted-by":"crossref","first-page":"329","DOI":"10.1016\/j.psychsport.2012.12.002","article-title":"Validation of the revised sport motivation scale (SMS-II)","volume":"14","author":"Pelletier","year":"2013","journal-title":"Psychol. Sport Exerc."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"628","DOI":"10.1177\/0013164409355698","article-title":"The motivation at work scale: Validation evidence in two languages","volume":"70","author":"Forest","year":"2010","journal-title":"Educ. Psychol. Meas."},{"key":"ref_44","first-page":"178","article-title":"Validation evidence in ten languages for the Revised Motivation at Work Scale","volume":"24","author":"Forest","year":"2014","journal-title":"Eur. J. Work. Organ. Psychol."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"1003","DOI":"10.1177\/0013164492052004025","article-title":"The Academic Motivation Scale: A measure of intrinsic, extrinsic, and amotivation in education","volume":"52","author":"Vallerand","year":"1992","journal-title":"Educ. Psychol. Meas."},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1002\/nvsm.1427","article-title":"Analysis of the motivations, generativity and demographics of the food bank volunteer","volume":"17","author":"Agostinho","year":"2012","journal-title":"Int. J. Nonprofit Volunt. Sect. Mark."},{"key":"ref_47","unstructured":"Martins, C. (2013). Motiva\u00e7\u00e3o para realizar voluntariado: Estudos segundo as abordagens funcionalista e da autodetermina\u00e7\u00e3o. [Motivation for volunteering: Studies with the functionalist and the self-determination approaches]. [PhD Thesis, University of Algarve]."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"930","DOI":"10.1177\/0146167201278002","article-title":"Need satisfaction, motivation, and well-being in the work organizations of a former eastern bloc country: A cross-cultural study of self-determination","volume":"27","author":"Deci","year":"2001","journal-title":"Personal. Soc. Psychol. Bull."},{"key":"ref_49","unstructured":"Amaral, M., and Franco-Borges, G. (2010). Integra\u00e7\u00e3o e Bem-Estar em Contexto de Trabalho, APDC\u2014Associa\u00e7\u00e3o para o Desenvolvimento da Carreira."},{"key":"ref_50","unstructured":"Paix\u00e3o, M.P., Silva, J.T., Miguel, J.P., Rodrigues, E., and Cardoso, I. (2010, January 4\u20136). Instrumentalidade da matem\u00e1tica em alunos do ensino secund\u00e1rio [Instrumentality of Mathematics in Secondary School Students]. Proceedings of the Comunica\u00e7\u00e3o Oral apresentada no VII Simp\u00f3sio Nacional de Investigac\u0327\u00e3o em Psicologia, Braga, Portugal."},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Behling, O., and Law, K.S. (2000). Translating Questionnaires and Other Research Instruments: Problems and Solutions, Sage Publications.","DOI":"10.4135\/9781412986373"},{"key":"ref_52","unstructured":"R Core Team (2022). R: A Language and Environment for Statistical Computing, R Foundation for Statistical Computing. Available online: https:\/\/www.R-project.org\/."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v048.i02","article-title":"lavaan: An R Package for Structural Equation Modeling","volume":"48","author":"Rosseel","year":"2012","journal-title":"J. Stat. Softw."},{"key":"ref_54","doi-asserted-by":"crossref","first-page":"936","DOI":"10.3758\/s13428-015-0619-7","article-title":"Confirmatory factor analysis with ordinal data: Comparing robust maximum likelihood and diagonally weighted least squares","volume":"48","author":"Li","year":"2016","journal-title":"Behav. Res."},{"key":"ref_55","doi-asserted-by":"crossref","first-page":"1716","DOI":"10.3758\/s13428-016-0814-1","article-title":"Univariate and multivariate skewness and kurtosis for measuring nonnormality: Prevalence, influence and estimation","volume":"49","author":"Cain","year":"2017","journal-title":"Behav. Res."},{"key":"ref_56","unstructured":"Mar\u00f4co, J. (2018). An\u00e1lise Estat\u00edstica com o SPSS Statistics, ReportNumber, Ld.. [7th ed.]."},{"key":"ref_57","unstructured":"Mar\u00f4co, J. (2014). Analise de Equa\u00e7\u00f5es Estruturais\u2014Fundamentos Te\u00f3ricos, Softwares e Aplica\u00e7\u00f5es, ReportNumber, Ld."},{"key":"ref_58","unstructured":"Hair, J., Black, W.C., Babin, B.J., and Anderson, R.E. (2010). Multivariate Data Analysis: A Global Perspective, Pearson Education, Cop.. [7th ed.]."},{"key":"ref_59","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1177\/002224378101800104","article-title":"Evaluating Structural Equation Models with Unobservable Variables and Measurement Error","volume":"18","author":"Fornell","year":"1981","journal-title":"J. Mark. Res."},{"key":"ref_60","doi-asserted-by":"crossref","first-page":"325","DOI":"10.1177\/0049124183011003003","article-title":"The analysis of covariance structures: Goodness-of-fit indices","volume":"11","author":"Hoelter","year":"1983","journal-title":"Sociol. Methods Res."},{"key":"ref_61","doi-asserted-by":"crossref","first-page":"410","DOI":"10.1504\/IJCSM.2016.080073","article-title":"Significance of non-parametric statistical tests for comparison of classifiers over multiple datasets","volume":"7","author":"Singh","year":"2016","journal-title":"Int. J. Comput. Sci. Math."},{"key":"ref_62","first-page":"405","article-title":"How can students feel more vital amidst severe restrictions? Psychological needs satisfaction, motivational regulation and vitality of students during the coronavirus pandemic restrictions","volume":"11","author":"Martinek","year":"2021","journal-title":"Eur. J. Investig. Health Psychol. Educ."}],"container-title":["Sustainability"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2071-1050\/16\/1\/327\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T21:44:14Z","timestamp":1760132654000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2071-1050\/16\/1\/327"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,12,29]]},"references-count":62,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2024,1]]}},"alternative-id":["su16010327"],"URL":"https:\/\/doi.org\/10.3390\/su16010327","relation":{},"ISSN":["2071-1050"],"issn-type":[{"type":"electronic","value":"2071-1050"}],"subject":[],"published":{"date-parts":[[2023,12,29]]}}}